Commit | Line | Data |
---|---|---|
23f87bed MB |
1 | ;;; pgg-pgp.el --- PGP 2.* and 6.* support for PGG. |
2 | ||
e84b4b86 | 3 | ;; Copyright (C) 1999, 2000, 2002, 2003, 2004, |
409cc4a3 | 4 | ;; 2005, 2006, 2007, 2008 Free Software Foundation, Inc. |
23f87bed MB |
5 | |
6 | ;; Author: Daiki Ueno <ueno@unixuser.org> | |
7 | ;; Created: 1999/11/02 | |
8 | ;; Keywords: PGP, OpenPGP | |
9 | ||
10 | ;; This file is part of GNU Emacs. | |
11 | ||
eb3fa2cf | 12 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
23f87bed | 13 | ;; it under the terms of the GNU General Public License as published by |
eb3fa2cf GM |
14 | ;; the Free Software Foundation, either version 3 of the License, or |
15 | ;; (at your option) any later version. | |
23f87bed MB |
16 | |
17 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
18 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | ;; GNU General Public License for more details. | |
21 | ||
22 | ;; You should have received a copy of the GNU General Public License | |
eb3fa2cf | 23 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
23f87bed MB |
24 | |
25 | ;;; Code: | |
26 | ||
27 | (eval-when-compile | |
28 | (require 'cl) ; for pgg macros | |
29 | (require 'pgg)) | |
30 | ||
31 | (defgroup pgg-pgp () | |
5a210b89 | 32 | "PGP 2.* and 6.* interface." |
23f87bed MB |
33 | :group 'pgg) |
34 | ||
35 | (defcustom pgg-pgp-program "pgp" | |
36 | "PGP 2.* and 6.* executable." | |
37 | :group 'pgg-pgp | |
38 | :type 'string) | |
39 | ||
40 | (defcustom pgg-pgp-shell-file-name "/bin/sh" | |
41 | "File name to load inferior shells from. | |
42 | Bourne shell or its equivalent \(not tcsh) is needed for \"2>\"." | |
43 | :group 'pgg-pgp | |
44 | :type 'string) | |
45 | ||
46 | (defcustom pgg-pgp-shell-command-switch "-c" | |
47 | "Switch used to have the shell execute its command line argument." | |
48 | :group 'pgg-pgp | |
49 | :type 'string) | |
50 | ||
51 | (defcustom pgg-pgp-extra-args nil | |
52 | "Extra arguments for every PGP invocation." | |
53 | :group 'pgg-pgp | |
54 | :type '(choice | |
55 | (const :tag "None" nil) | |
56 | (string :tag "Arguments"))) | |
57 | ||
58 | (defvar pgg-pgp-user-id nil | |
59 | "PGP ID of your default identity.") | |
60 | ||
61 | (defun pgg-pgp-process-region (start end passphrase program args) | |
62 | (let* ((errors-file-name (pgg-make-temp-file "pgg-errors")) | |
63 | (args | |
3559aa8b | 64 | (concat args |
23f87bed | 65 | pgg-pgp-extra-args |
3559aa8b | 66 | " 2>" (shell-quote-argument errors-file-name))) |
23f87bed MB |
67 | (shell-file-name pgg-pgp-shell-file-name) |
68 | (shell-command-switch pgg-pgp-shell-command-switch) | |
69 | (process-environment process-environment) | |
70 | (output-buffer pgg-output-buffer) | |
71 | (errors-buffer pgg-errors-buffer) | |
72 | (process-connection-type nil) | |
73 | process status exit-status) | |
74 | (with-current-buffer (get-buffer-create output-buffer) | |
75 | (buffer-disable-undo) | |
76 | (erase-buffer)) | |
77 | (when passphrase | |
78 | (setenv "PGPPASSFD" "0")) | |
79 | (unwind-protect | |
80 | (progn | |
81 | (let ((coding-system-for-read 'binary) | |
82 | (coding-system-for-write 'binary)) | |
83 | (setq process | |
3559aa8b SM |
84 | (start-process-shell-command "*PGP*" output-buffer |
85 | (concat program " " args)))) | |
23f87bed MB |
86 | (set-process-sentinel process #'ignore) |
87 | (when passphrase | |
88 | (process-send-string process (concat passphrase "\n"))) | |
89 | (process-send-region process start end) | |
90 | (process-send-eof process) | |
91 | (while (eq 'run (process-status process)) | |
92 | (accept-process-output process 5)) | |
93 | (setq status (process-status process) | |
94 | exit-status (process-exit-status process)) | |
95 | (delete-process process) | |
96 | (with-current-buffer output-buffer | |
97 | (pgg-convert-lbt-region (point-min)(point-max) 'LF) | |
98 | ||
99 | (if (memq status '(stop signal)) | |
100 | (error "%s exited abnormally: '%s'" program exit-status)) | |
101 | (if (= 127 exit-status) | |
102 | (error "%s could not be found" program)) | |
103 | ||
104 | (set-buffer (get-buffer-create errors-buffer)) | |
105 | (buffer-disable-undo) | |
106 | (erase-buffer) | |
107 | (insert-file-contents errors-file-name))) | |
108 | (if (and process (eq 'run (process-status process))) | |
109 | (interrupt-process process)) | |
110 | (condition-case nil | |
111 | (delete-file errors-file-name) | |
112 | (file-error nil))))) | |
113 | ||
114 | (defun pgg-pgp-lookup-key (string &optional type) | |
115 | "Search keys associated with STRING." | |
116 | (let ((args (list "+batchmode" "+language=en" "-kv" string))) | |
117 | (with-current-buffer (get-buffer-create pgg-output-buffer) | |
118 | (buffer-disable-undo) | |
119 | (erase-buffer) | |
120 | (apply #'call-process pgg-pgp-program nil t nil args) | |
121 | (goto-char (point-min)) | |
122 | (cond | |
123 | ((re-search-forward "^pub\\s +[0-9]+/" nil t);PGP 2.* | |
124 | (buffer-substring (point)(+ 8 (point)))) | |
125 | ((re-search-forward "^Type" nil t);PGP 6.* | |
126 | (beginning-of-line 2) | |
127 | (substring | |
128 | (nth 2 (split-string | |
129 | (buffer-substring (point)(progn (end-of-line) (point))))) | |
130 | 2)))))) | |
131 | ||
c6037c00 | 132 | (defun pgg-pgp-encrypt-region (start end recipients &optional sign passphrase) |
23f87bed MB |
133 | "Encrypt the current region between START and END." |
134 | (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id)) | |
c6037c00 | 135 | (passphrase (or passphrase |
26c9afc3 MB |
136 | (when sign |
137 | (pgg-read-passphrase | |
138 | (format "PGP passphrase for %s: " | |
139 | pgg-pgp-user-id) | |
140 | pgg-pgp-user-id)))) | |
23f87bed | 141 | (args |
3559aa8b SM |
142 | (concat |
143 | "+encrypttoself=off +verbose=1 +batchmode +language=us -fate " | |
bb4c0f16 | 144 | (if (or recipients pgg-encrypt-for-me) |
3559aa8b SM |
145 | (mapconcat 'shell-quote-argument |
146 | (append recipients | |
147 | (if pgg-encrypt-for-me | |
148 | (list pgg-pgp-user-id))))) | |
149 | (if sign (concat " -s -u " (shell-quote-argument pgg-pgp-user-id)))))) | |
23f87bed MB |
150 | (pgg-pgp-process-region start end nil pgg-pgp-program args) |
151 | (pgg-process-when-success nil))) | |
152 | ||
c6037c00 EZ |
153 | (defun pgg-pgp-decrypt-region (start end &optional passphrase) |
154 | "Decrypt the current region between START and END. | |
155 | ||
156 | If optional PASSPHRASE is not specified, it will be obtained from the | |
157 | passphrase cache or user." | |
23f87bed | 158 | (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id)) |
710f2e1b | 159 | (key (pgg-pgp-lookup-key pgg-pgp-user-id 'encrypt)) |
23f87bed | 160 | (passphrase |
26c9afc3 MB |
161 | (or passphrase |
162 | (pgg-read-passphrase | |
163 | (format "PGP passphrase for %s: " pgg-pgp-user-id) key))) | |
23f87bed | 164 | (args |
3559aa8b | 165 | "+verbose=1 +batchmode +language=us -f")) |
23f87bed | 166 | (pgg-pgp-process-region start end passphrase pgg-pgp-program args) |
710f2e1b SJ |
167 | (pgg-process-when-success |
168 | (if pgg-cache-passphrase | |
c6037c00 EZ |
169 | (pgg-add-passphrase-to-cache key passphrase))))) |
170 | ||
171 | (defun pgg-pgp-sign-region (start end &optional clearsign passphrase) | |
172 | "Make detached signature from text between START and END. | |
23f87bed | 173 | |
c6037c00 EZ |
174 | If optional PASSPHRASE is not specified, it will be obtained from the |
175 | passphrase cache or user." | |
23f87bed MB |
176 | (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id)) |
177 | (passphrase | |
26c9afc3 MB |
178 | (or passphrase |
179 | (pgg-read-passphrase | |
180 | (format "PGP passphrase for %s: " pgg-pgp-user-id) | |
181 | (pgg-pgp-lookup-key pgg-pgp-user-id 'sign)))) | |
23f87bed | 182 | (args |
3559aa8b SM |
183 | (concat (if clearsign "-fast" "-fbast") |
184 | " +verbose=1 +language=us +batchmode" | |
185 | " -u " (shell-quote-argument pgg-pgp-user-id)))) | |
23f87bed MB |
186 | (pgg-pgp-process-region start end passphrase pgg-pgp-program args) |
187 | (pgg-process-when-success | |
188 | (goto-char (point-min)) | |
189 | (when (re-search-forward "^-+BEGIN PGP" nil t);XXX | |
190 | (let ((packet | |
191 | (cdr (assq 2 (pgg-parse-armor-region | |
192 | (progn (beginning-of-line 2) | |
193 | (point)) | |
194 | (point-max)))))) | |
195 | (if pgg-cache-passphrase | |
c6037c00 | 196 | (pgg-add-passphrase-to-cache |
23f87bed MB |
197 | (cdr (assq 'key-identifier packet)) |
198 | passphrase))))))) | |
199 | ||
200 | (defun pgg-pgp-verify-region (start end &optional signature) | |
201 | "Verify region between START and END as the detached signature SIGNATURE." | |
202 | (let* ((orig-file (pgg-make-temp-file "pgg")) | |
3559aa8b | 203 | (args "+verbose=1 +batchmode +language=us") |
23f87bed MB |
204 | (orig-mode (default-file-modes))) |
205 | (unwind-protect | |
206 | (progn | |
207 | (set-default-file-modes 448) | |
208 | (let ((coding-system-for-write 'binary) | |
209 | jka-compr-compression-info-list jam-zcat-filename-list) | |
210 | (write-region start end orig-file))) | |
211 | (set-default-file-modes orig-mode)) | |
212 | (if (stringp signature) | |
213 | (progn | |
214 | (copy-file signature (setq signature (concat orig-file ".asc"))) | |
3559aa8b SM |
215 | (setq args (concat args " " (shell-quote-argument signature))))) |
216 | (setq args (concat args " " (shell-quote-argument orig-file))) | |
23f87bed MB |
217 | (pgg-pgp-process-region (point)(point) nil pgg-pgp-program args) |
218 | (delete-file orig-file) | |
219 | (if signature (delete-file signature)) | |
220 | (pgg-process-when-success | |
221 | (goto-char (point-min)) | |
222 | (let ((case-fold-search t)) | |
223 | (while (re-search-forward "^warning: " nil t) | |
224 | (delete-region (match-beginning 0) | |
225 | (progn (beginning-of-line 2) (point))))) | |
226 | (goto-char (point-min)) | |
227 | (when (re-search-forward "^\\.$" nil t) | |
228 | (delete-region (point-min) | |
229 | (progn (beginning-of-line 2) | |
230 | (point))))))) | |
231 | ||
232 | (defun pgg-pgp-insert-key () | |
233 | "Insert public key at point." | |
234 | (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id)) | |
235 | (args | |
3559aa8b SM |
236 | (concat "+verbose=1 +batchmode +language=us -kxaf " |
237 | (shell-quote-argument pgg-pgp-user-id)))) | |
23f87bed MB |
238 | (pgg-pgp-process-region (point)(point) nil pgg-pgp-program args) |
239 | (insert-buffer-substring pgg-output-buffer))) | |
240 | ||
241 | (defun pgg-pgp-snarf-keys-region (start end) | |
242 | "Add all public keys in region between START and END to the keyring." | |
243 | (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id)) | |
244 | (key-file (pgg-make-temp-file "pgg")) | |
245 | (args | |
3559aa8b SM |
246 | (concat "+verbose=1 +batchmode +language=us -kaf " |
247 | (shell-quote-argument key-file)))) | |
23f87bed MB |
248 | (let ((coding-system-for-write 'raw-text-dos)) |
249 | (write-region start end key-file)) | |
250 | (pgg-pgp-process-region start end nil pgg-pgp-program args) | |
251 | (delete-file key-file) | |
252 | (pgg-process-when-success nil))) | |
253 | ||
254 | (provide 'pgg-pgp) | |
255 | ||
3559aa8b | 256 | ;; arch-tag: 076b7801-37b2-49a6-97c3-218fdecde33c |
23f87bed | 257 | ;;; pgg-pgp.el ends here |